package com.brainhealth.common.utils;

import java.lang.management.ManagementFactory;
import java.math.BigDecimal;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.*;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoUnit;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

import org.apache.commons.lang3.time.DateFormatUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * 时间工具类
 *
 * @author wolong
 */
public class DateUtils extends org.apache.commons.lang3.time.DateUtils {
    /**
     * 日志
     */
    protected static final Logger logger = LoggerFactory.getLogger(DateUtils.class);

    public static String YYYY = "yyyy";

    public static String YYYY_MM = "yyyy-MM";

    public static String YYYY_MM_DD = "yyyy-MM-dd";

    public static String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";

    public static String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";

    private static String[] parsePatterns = {
            "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM",
            "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM",
            "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM"};

    /**
     * 获取当前Date型日期
     *
     * @return Date() 当前日期
     */
    public static Date getNowDate()
    {
        return new Date();
    }

    /**
     * 获取当前日期, 默认格式为yyyy-MM-dd
     *
     * @return String
     */
    public static String getDate()
    {
        return dateTimeNow(YYYY_MM_DD);
    }

    public static final String getTime()
    {
        return dateTimeNow(YYYY_MM_DD_HH_MM_SS);
    }

    public static final String dateTimeNow()
    {
        return dateTimeNow(YYYYMMDDHHMMSS);
    }

    public static final String dateTimeNow(final String format)
    {
        return parseDateToStr(format, new Date());
    }

    public static final String dateTime(final Date date)
    {
        return parseDateToStr(YYYY_MM_DD, date);
    }

    public static final String parseDateToStr(final String format, final Date date)
    {
        return new SimpleDateFormat(format).format(date);
    }

    public static final Date dateTime(final String format, final String ts)
    {
        try
        {
            return new SimpleDateFormat(format).parse(ts);
        }
        catch (ParseException e)
        {
            throw new RuntimeException(e);
        }
    }

    /**
     * 日期路径 即年/月/日 如2018/08/08
     */
    public static final String datePath()
    {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyy/MM/dd");
    }

    /**
     * 日期路径 即年/月/日 如20180808
     */
    public static final String dateTime()
    {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyyMMdd");
    }

    /**
     * 日期型字符串转化为日期 格式
     */
    public static Date parseDate(Object str)
    {
        if (str == null)
        {
            return null;
        }
        try
        {
            return parseDate(str.toString(), parsePatterns);
        }
        catch (ParseException e)
        {
            return null;
        }
    }

    /**
     * 获取服务器启动时间
     */
    public static Date getServerStartDate()
    {
        long time = ManagementFactory.getRuntimeMXBean().getStartTime();
        return new Date(time);
    }

    /**
     * 计算相差天数
     */
    public static int differentDaysByMillisecond(Date bDate, Date eDate)
    {
        return Math.abs((int) ((eDate.getTime() - bDate.getTime()) / (1000 * 3600 * 24)));
    }

    /**
     * 计算相差小时
     * @param bDate 开始时间
     * @param eDate 结束时间
     * @return
     */
    public static int differentHoursByMillisecond(Date bDate, Date eDate)
    {
        return Math.abs((int) ((eDate.getTime() - bDate.getTime()) / (1000 * 3600)));
    }

    /**
     * 计算相差分钟
     * @param bDate
     * @param eDate
     * @return
     */
    public static int differentMinuteByMillisecond(Date bDate, Date eDate)
    {
        return Math.abs((int) ((eDate.getTime() - bDate.getTime()) / (1000 * 60)));
    }

    /**
     * 计算相差秒
     * @param bDate
     * @param eDate
     * @return
     */
    public static int differentSecondByMillisecond(Date bDate, Date eDate)
    {
        return Math.abs((int) ((eDate.getTime() - bDate.getTime()) / 1000));
    }

    /**
     * 计算时间差
     *
     * @param endTime 最后时间
     * @param startTime 开始时间
     * @return 时间差（天/小时/分钟）
     */
    public static String timeDistance(Date endTime, Date startTime)
    {
        long nd = 1000 * 24 * 60 * 60;
        long nh = 1000 * 60 * 60;
        long nm = 1000 * 60;
        // long ns = 1000;
        // 获得两个时间的毫秒时间差异
        long diff = endTime.getTime() - startTime.getTime();
        // 计算差多少天
        long day = diff / nd;
        // 计算差多少小时
        long hour = diff % nd / nh;
        // 计算差多少分钟
        long min = diff % nd % nh / nm;
        // 计算差多少秒//输出结果
        // long sec = diff % nd % nh % nm / ns;
        return day + "天" + hour + "小时" + min + "分钟";
    }

    /**
     * 增加 LocalDateTime ==> Date
     */
    public static Date toDate(LocalDateTime temporalAccessor)
    {
        ZonedDateTime zdt = temporalAccessor.atZone(ZoneId.systemDefault());
        return Date.from(zdt.toInstant());
    }

    /**
     * 增加 LocalDate ==> Date
     */
    public static Date toDate(LocalDate temporalAccessor)
    {
        LocalDateTime localDateTime = LocalDateTime.of(temporalAccessor, LocalTime.of(0, 0, 0));
        ZonedDateTime zdt = localDateTime.atZone(ZoneId.systemDefault());
        return Date.from(zdt.toInstant());
    }

    /**
     * 将日期转为标准字符串格式
     */
    public static String getFormatDate(Date date,String formatter) {
        if (null == date) {
            return null;
        }
        LocalDateTime ldt = LocalDateTime.ofInstant(date.toInstant(), ZoneOffset.UTC);
        DateTimeFormatter dtf = DateTimeFormatter.ofPattern(formatter);
        String formatDate = dtf.format(ldt);
        return formatDate;
    }

    public static long getTimeMillis() {
        return System.currentTimeMillis();
    }

    public static boolean compare(Date date1, Date date2) {
        if (null == date1 || null == date2) {
            logger.warn("入参为空date1:{} date2:{}", date1, date2);
        }
        return date1.compareTo(date2) > 0;
    }

    public static List<String> getDatesBetween(String strStartDate,String strEndDate) {
        DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(YYYY_MM_DD);
        LocalDate startDate = LocalDate.parse(strStartDate,dateTimeFormatter);
        LocalDate endDate = LocalDate.parse(strEndDate,dateTimeFormatter);
        List<String> dateList = new ArrayList<>();
        long numOfDaysBetween = ChronoUnit.DAYS.between(startDate, endDate);
        numOfDaysBetween = numOfDaysBetween+1;
        for (int i = 1; i <= numOfDaysBetween; i++) {
            LocalDate date = startDate.plusDays(i);
            Date formatDate = Date.from(date.atStartOfDay().atZone(ZoneId.systemDefault()).toInstant());
            dateList.add(getFormatDate(formatDate,YYYY_MM_DD));
        }
        return dateList;
    }

    /**
     * 得到几天后的时间
     */
    public static Date getDateAfter(Date d, int day) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(d);
        calendar.set(Calendar.DATE, calendar.get(Calendar.DATE) + day);
        return calendar.getTime();
    }

    /**
     * 得到几天后的时间(字符串格式)
     * @param strDate
     * @param day
     * @return
     */
    public static String getStrDateAfter(String strDate, int day) {
        Date date = parseDate(strDate);
        Date dateAfter = getDateAfter(date, day);
        return dateTime(dateAfter);
    }

    public static Double getMinute(Long seconds) {
        if (null == seconds) {
            return null;
        }
        Double doubleSeconds = new Double(seconds);
        Double doubleMinute = doubleSeconds / 60;
        BigDecimal b = new BigDecimal(doubleMinute);
        double result = b.setScale(1, BigDecimal.ROUND_HALF_UP).doubleValue();
        return result;
    }

}
